Ohme Tethered 32A 7kw EV Charger Type 2, 5m cable. The Ohme Wall Charger is a great partner for any electric vehicle. Ohme will automatically choose the cheapest available electricity to save the user money. The charger can also be set up through the Ohme app to charge your vehicle when the grid is at its greenest. The charger includes RCD, and comes with a pre-installed SIM card with 3G /4G connectivity, this also allows for easy installation and set up.